package com.wmx.mysql;

import java.sql.Connection;
import java.sql.SQLException;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.util.Date;
import java.util.UUID;

public class MySqlInsert {

        public static void main(String[] args) throws ClassNotFoundException, SQLException {
            //final String url = "jdbc:mysql://192.168.19.129:4002/wumengxin?useUnicode=true&useJDBCCompliantTimezoneShift=true&useLegacyDatetimeCode=false&serverTimezone=UTC&?autoReconnect=true";
            final String url = "jdbc:mysql://192.168.19.131:4002/wumengxin?useUnicode=true&characterEncoding=utf8&useSSL=false";
            final String name = "com.mysql.jdbc.Driver";
            final String user = "root";
            final String password = "admin";
            Connection conn = null;
            Class.forName(name);//指定连接类型
            conn = DriverManager.getConnection(url, user, password);//获取连接
            if (conn != null) {
                System.out.println("获取连接成功");
                insert(conn);
            } else {
                System.out.println("获取连接失败");
            }

        }

        public static void insert(Connection conn) {
            // 开始时间
            Long begin = new Date().getTime();
            // sql前缀
            String prefix = "INSERT INTO student (NAME , ID) VALUES ";
            try {
                int a =0;
                // 保存sql后缀
                StringBuffer suffix = new StringBuffer();

                // 设置事务为非自动提交
                conn.setAutoCommit(false);
                // 比起st，pst会更好些
                PreparedStatement pst = (PreparedStatement) conn.prepareStatement(" ");//准备执行语句
                // 外层循环，总提交事务次数
                for (int i = 1; i <= 50; i++) {
                    suffix = new StringBuffer();
                    // 第j次提交步长
                    for (int j = 1; j <= 100000; j++) {
                        a++;
                        // 构建SQL后缀
                        suffix.append("('" + "cxx" + j + "',"+a+ "),");
                        //suffix.append("('" + "cxx" + j + "',"+a+","+23+","+"'1111@qq.com'"+","+"'四川省高新区'"+"),");
                    }
                    // 构建完整SQL
                    String sql = prefix + suffix.substring(0, suffix.length() - 1);
                    // 添加执行SQL
                    pst.addBatch(sql);

                    // 执行操作
                    pst.executeBatch();
                    // 提交事务
                    conn.commit();
                    // 清空上一次添加的数据
                    suffix = new StringBuffer();
                }
                // 头等连接
                pst.close();
                conn.close();
            } catch (SQLException e) {
                e.printStackTrace();

                return;
            }
            // 结束时间
            Long end = new Date().getTime();
            // 耗时
            System.out.println("1000万条数据插入花费时间 : " + (end - begin) / 1000 + " s");
            System.out.println("插入完成");
        }


}
